Deck corrosion
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- G-Private First Class
- Posts: 14
- Joined: Tue Sep 01, 2015 1:24 pm
- Location: S. Pittsburg, TN
Deck corrosion
Is there anyway short of media blasting to strip magnesium oxide off to prime a deck? How is using a sander or chemicals? I hate usin aircraft stripper, especially since it’s cold now. You guys have any tricks up your sleeves?
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- G-First Lieutenant
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Re: Deck corrosion
Below are a few Web Sites for Magnesium Prep and Painting
http://www.vintagebonanza.com/prep_magn ... inting.htm
On the following page click to download Mil-M-3171C 11 July 1966
Aldine Magnesium Treatment Kit Publication
http://www.associatedindustriesinc.com/ ... KIT-ds.pdf
Site to purchase this kit OUCH!
https://www.skygeek.com/henkel-598970-a ... t-kit.html
Another Site to purchase and scroll to bottom of article to Documentation: to download Process Instructions
http://www.chemical-supermarket.com/Mag ... -p421.html
I have all the articles downloaded as a PDF but unable to upload into my Album. Contact me via E-Mail and I will attach to my Reply
http://www.vintagebonanza.com/prep_magn ... inting.htm
On the following page click to download Mil-M-3171C 11 July 1966
Aldine Magnesium Treatment Kit Publication
http://www.associatedindustriesinc.com/ ... KIT-ds.pdf
Site to purchase this kit OUCH!
https://www.skygeek.com/henkel-598970-a ... t-kit.html
Another Site to purchase and scroll to bottom of article to Documentation: to download Process Instructions
http://www.chemical-supermarket.com/Mag ... -p421.html
I have all the articles downloaded as a PDF but unable to upload into my Album. Contact me via E-Mail and I will attach to my Reply
Mules are my passion
www.m274armymules.com
www.m274armymules.com
- Grummanflyer
- G-Sergeant Major
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Re: Deck corrosion
If you are removing the old paint, these would be used after that is done. If it's really just oxide, sanding is probably all you need. The products Charles is refering to are used to give the metal some "tooth" for the chromate primer at attach it's self to. Usually applied to mag and aluminum aircraft surfaces that are pretty smooth. There are not too many choices short of grit blasting or chemical stripping the old paint off and even chem stripping will not get every single bit off. Grit blasting will produce the quickest results but it is a little difficult. That chemical stripper is a pain, burns your hands or any thing it touches, and has to be washed away with great care or it will lay under the paint and continue to eat and believe me, that gets very ugly. BT,DT (been there, done that)
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- G-Private First Class
- Posts: 14
- Joined: Tue Sep 01, 2015 1:24 pm
- Location: S. Pittsburg, TN
Re: Deck corrosion
Thanks for the info. So far I am really just trying to get rid of the oxide. The mule sat in my grandfathers barn for years and the places the paint had worn off was covered in magnesium oxide. Overall the deck is rough, I am just trying to get it cleaned up the best I can to throw some paint on it. I have done some paint removal and painting of aluminum on some old Land rovers, so it isn’t too different minus he flammable dust. I was just trying to not take too much of the base metal while stripping the chips and oxide off. So far I was just using some scotchbrite pads on a grinder, moving real light. Now that it is cold the chemical stripping is kind of out of the question in an enclosed garage. So are y’all saying that I need to pre treat the metal before using a self-etching primer?
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- G-Lieutenant General
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Re: Deck corrosion
To me, it really depends on how much time, effort and money you want to spend. The mag decks are usually so rough anyway, I'd just go over it lightly with a scotchbrite disc, give it an immediate cleaning and prime with zinc chromate. You can overcoat with whatever OD you use. You may have to do it again in 4-5 years, but that's just the nature of the magnesium. You can spend a ton of money on products to try to encapsulate the magnesium or just spend a little time every few years doing paint maintenance. Good luck with your project and please post photos, we all love photos!
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- G-Private First Class
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- Joined: Tue Sep 01, 2015 1:24 pm
- Location: S. Pittsburg, TN
Re: Deck corrosion
Here is what I’m starting with. I removed the engine, rails, and some data plates. There are numerous holes in the deck, two look like holes to mount a passenger seat back, others are just holes I guess. Engine is on the table, I’m going to be ordering some cylinders and pistons from John Emery soon.
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- G-First Lieutenant
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Re: Deck corrosion
Looking at the pics I see 2 positions for your seat back, 4 holes in the right rear of the deck for a muffler and a modified transmission housing for the 2cyl starter. From this: it was originally a M274-A1 that was converted to a 2cyl and is now a M274-A4. What does your data plate on the side show? Sorry someone cut the bed support to allow the mounting of a VW starter no good way of welding that back in without pieces from another deck. You could inset aluminum strips on the inside of the cut area and then fill with bondo or fiberglass to hid cut. Then you will need to purchase another stater.
Mules are my passion
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- G-Lieutenant Colonel
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Re: Deck corrosion
What is that thick white coating on the top of the deck? It almost appears to me like bondo body filler sprayed on. I have several mule decks with the same treatment, is this on all mules?
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- G-First Lieutenant
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Re: Deck corrosion
It appears to be corrosion due to exposed uncoated magnesium.
For an in-depth article see:
https://www.intechopen.com/books/magnes ... ium-alloys
A Thread on Magnesium Alloys covering Prep and Coating see:
https://www.arboristsite.com/community/ ... oys.71834/
An Article on CHEMEON Pretreatment & Conversion Coating for Magnesium Alloys:
https://chemeon.com/wp-content/uploads/ ... Alloys.pdf
These are a few of the articles found on the Internet.
For an in-depth article see:
https://www.intechopen.com/books/magnes ... ium-alloys
A Thread on Magnesium Alloys covering Prep and Coating see:
https://www.arboristsite.com/community/ ... oys.71834/
An Article on CHEMEON Pretreatment & Conversion Coating for Magnesium Alloys:
https://chemeon.com/wp-content/uploads/ ... Alloys.pdf
These are a few of the articles found on the Internet.
Mules are my passion
www.m274armymules.com
www.m274armymules.com
- B8B
- G-Staff Sergeant
- Posts: 61
- Joined: Thu Jul 22, 2004 8:08 pm
- Location: Winter Park, FL
Re: Deck corrosion
I'm working with a similar situation with my 'FrankenMule' (an A3 with lots of parts from other models). It was used as a work vehicle and has lots of holes in it, mostly small ones. So I'm using my favorite technique of using "J-B Stik Weld", a gray epoxy clay that hardens to a sandable finish.Wbdisco wrote: ↑Sun Nov 18, 2018 1:54 pmHere is what I’m starting with. I removed the engine, rails, and some data plates. There are numerous holes in the deck, two look like holes to mount a passenger seat back, others are just holes I guess. Engine is on the table, I’m going to be ordering some cylinders and pistons from John Emery soon.
A37FF686-7B93-4234-9677-0C2FA27A297D.jpeg
I'm grinding out the holes with a Dremel tool, wiping it clean with acetone, then shoving a glob of J-B Stik into the hole. If I can get to the underside, I push some back up to create a ''mushroom head' on both sides, then after it dries (in about an hour) I sand it smooth. Done right, it can be almost undetectable!
Brian
'58 M274A3 Mule, SN 10965
'62 M422A1 Mighty-Mite, SN 3741
'65 M416-B1 Mighty-Mite Trailer, SN 11
'97 LTT-HC 'Mule Hauler' Trailer, SN "H.A.C.-054"
'62 M422A1 Mighty-Mite, SN 3741
'65 M416-B1 Mighty-Mite Trailer, SN 11
'97 LTT-HC 'Mule Hauler' Trailer, SN "H.A.C.-054"
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